P7 revision group

dear Sir/ Mrs.

I appreciate if you advice us on this link (here-below)
https://opentuition.com/topic/p7-week-end-group-revision-online/#post-189240

we need to start our P7 revision group, this week on the opentuition website,
but most of us haven’t the experiences how to start
so we need two advices;

1) will this revision group be helpful, or just waste our time?
2) what are the best way to start this revision group?

thanks for support